Yes. In western Canada, especially Alberta, B.C., and I believe all of Saskatchewan, we aren't using it now.
The interesting thing is the substance itself has never posed health threats or a food safety issue. But we do have one that may come across our border called carbadox, that we are not allowed to use in Canada, but it is a product that our American cousins are allowed to use. That product freely comes across our border, and someone might want to look into that one day.